indenone

例句：

1. 1. Thecompound has been shown to have anti-cancer properties.
   这种化合物已被证明具有抗癌症性质。
2. 2. The indenone derivative isa key intermediate in the synthesis of thisdrug.
   吲哚酮衍生物是合成这种药物的关键中间体。
3. 3. Indenones are found in natureand have been used as naturalpigments.
   吲哚酮存在于自然界中，并被用作天然色素。